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Nasal block and suffocation is common during emotional situations. There is nasal congestion
due to the parasympathetic secretion in the nose. Your wife must also be having anatomical obstruction in the nose and the block is getting worsened during emotional situations. Please, consult a good ENT specialist
and till then she can use saline nasal drops to clear any nasal block and do steam inhalation also.
Dr. Naveen Kumar